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Diffstat (limited to 'security/selinux/ss/hashtab.c')
-rw-r--r--security/selinux/ss/hashtab.c44
1 files changed, 23 insertions, 21 deletions
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index 5ee868116d70..8126b909a757 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -29,16 +29,10 @@ static u32 hashtab_compute_size(u32 nel)
return nel == 0 ? 0 : roundup_pow_of_two(nel);
}
-int hashtab_init(struct hashtab *h,
- u32 (*hash_value)(struct hashtab *h, const void *key),
- int (*keycmp)(struct hashtab *h, const void *key1,
- const void *key2),
- u32 nel_hint)
+int hashtab_init(struct hashtab *h, u32 nel_hint)
{
h->size = hashtab_compute_size(nel_hint);
h->nel = 0;
- h->hash_value = hash_value;
- h->keycmp = keycmp;
if (!h->size)
return 0;
@@ -46,7 +40,8 @@ int hashtab_init(struct hashtab *h,
return h->htable ? 0 : -ENOMEM;
}
-int hashtab_insert(struct hashtab *h, void *key, void *datum)
+int hashtab_insert(struct hashtab *h, void *key, void *datum,
+ struct hashtab_key_params key_params)
{
u32 hvalue;
struct hashtab_node *prev, *cur, *newnode;
@@ -56,17 +51,20 @@ int hashtab_insert(struct hashtab *h, void *key, void *datum)
if (!h->size || h->nel == HASHTAB_MAX_NODES)
return -EINVAL;
- hvalue = h->hash_value(h, key);
+ hvalue = key_params.hash(key) & (h->size - 1);
prev = NULL;
cur = h->htable[hvalue];
- while (cur && h->keycmp(h, key, cur->key) > 0) {
+ while (cur) {
+ int cmp = key_params.cmp(key, cur->key);
+
+ if (cmp == 0)
+ return -EEXIST;
+ if (cmp < 0)
+ break;
prev = cur;
cur = cur->next;
}
- if (cur && (h->keycmp(h, key, cur->key) == 0))
- return -EEXIST;
-
newnode = kmem_cache_zalloc(hashtab_node_cachep, GFP_KERNEL);
if (!newnode)
return -ENOMEM;
@@ -84,7 +82,8 @@ int hashtab_insert(struct hashtab *h, void *key, void *datum)
return 0;
}
-void *hashtab_search(struct hashtab *h, const void *key)
+void *hashtab_search(struct hashtab *h, const void *key,
+ struct hashtab_key_params key_params)
{
u32 hvalue;
struct hashtab_node *cur;
@@ -92,15 +91,18 @@ void *hashtab_search(struct hashtab *h, const void *key)
if (!h->size)
return NULL;
- hvalue = h->hash_value(h, key);
+ hvalue = key_params.hash(key) & (h->size - 1);
cur = h->htable[hvalue];
- while (cur && h->keycmp(h, key, cur->key) > 0)
- cur = cur->next;
+ while (cur) {
+ int cmp = key_params.cmp(key, cur->key);
- if (!cur || (h->keycmp(h, key, cur->key) != 0))
- return NULL;
-
- return cur->datum;
+ if (cmp == 0)
+ return cur->datum;
+ if (cmp < 0)
+ break;
+ cur = cur->next;
+ }
+ return NULL;
}
void hashtab_destroy(struct hashtab *h)